With recent kernels the tun device file is located in /dev/net.

src/net.c

@@ -17,7 +17,7 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id: net.c,v 1.35.4.106 2001/05/25 08:36:11 guus Exp $
+    $Id: net.c,v 1.35.4.107 2001/05/25 10:08:11 guus Exp $
 */
 
 #include "config.h"
@@ -285,7 +285,7 @@ cp
    {
 #ifdef HAVE_LINUX
 # ifdef HAVE_TUNTAP
-      tapfname = "/dev/misc/net/tun";
+      tapfname = "/dev/net/tun";
 # else
       tapfname = "/dev/tap0";
 # endif
@@ -1151,7 +1151,7 @@ cp
       syslog(LOG_NOTICE, _("Trying to re-establish outgoing connection in 5 seconds"));
     }
 
-  /* Inactivate */
+  /* Deactivate */
 
   cl->status.active = 0;
 cp